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CPC464: Is it possible to add 64k memory internally?

Started by mr_lou, 20:08, 13 September 13

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mr_lou

My CPC464 currently has additional 64k memory externally. A big bulk of a box.

Is it possible to add these additional 64k internally, so I can have 128k total without that bulky external box?
Do you need music for your Amstrad CPC game project?
Take a look at IndieGameMusic.com - that's where I put my tracks.

TotO

Buy a 6128 and you will not have to put the external floppy drive inside too...
"You make one mistake in your life and the internet will never let you live it down" (Keith Goodyer)

mr_lou

Quote from: TotO on 21:11, 13 September 13Buy a 6128 and you will not have to put the external floppy drive inside too...

I have a CPC6128. And a modded CPC plus too.

I was just thinking, in the near future, maybe a DDI-1 + HxC could also fit inside a CPC464.  :)

Just a thought.

But just having the additional 64k fitted internally would probably mean I'd use my CPC464 more.
Currently it has gotten a somewhat low status, because the RAM and DDI-I modules doesn't give the best connection, causing it to sometimes freeze.
Do you need music for your Amstrad CPC game project?
Take a look at IndieGameMusic.com - that's where I put my tracks.

TotO

OK. In this case, difficult to reach w/o serious hack.
May be better to use it "as a 464" only.
"You make one mistake in your life and the internet will never let you live it down" (Keith Goodyer)

mr_lou

Adding an additional 64k ram internally requires a serious hack?
(Forget about the DDI-1 and HxC).
Do you need music for your Amstrad CPC game project?
Take a look at IndieGameMusic.com - that's where I put my tracks.

steve

I have an idea that somebody once replaced the 64k chips with 256k chips, but that does not tell you anything about whether it is possible or how they may have performed the bankswitching.

Joseman

Hi

Of course it's possible, the 6128 is a 464 expanded isn't it?

Surely it needs to cutdown a lot of tracks, "insert" in the middle the second bank, the bank switching chip, and possibly retrack this chip, i recall it shares the same I/O addresses of another chip, perhaps some condensers...

Hard work without doubt

TotO

First, it will be interesting to see your expansion board...  :D
Then, the more simple way will be to make a 50 pin Edge connector to ribbon cable, which each line soldered on the "centronics internal pins".
But, it's a quick and dirty hack. I dislike the idea.


Quote from: steve on 07:56, 14 September 13
I have an idea that somebody once replaced the 64k chips with 256k chips, but that does not tell you anything about whether it is possible or how they may have performed the bankswitching.
I already though about that in the past, as the CRTC get free address lines to support that.
In this case, all the RAM will see seen by the GA and can used for the display.
But those extra lines need a bank switching system too... Not sure that was possible to make something "standard" and usable.
"You make one mistake in your life and the internet will never let you live it down" (Keith Goodyer)

Bryce

Yes, much the same as how I installed the MegaFlash internally on your 464+. Make an internal expansion port and connect it there.

Bryce.

TFM

TFM of FutureSoft
Also visit the CPC and Plus users favorite OS: FutureOS - The Revolution on CPC6128 and 6128Plus

Bryce

It's not that difficult, it just takes quite a bit of time. You can see pictures of the internal expansion connector I did for the 464+ here: 464+ Mod

Bryce.

TFM

Of course, and it must not be done all at once.


NO!!! DON'T DRINK ALL THAT COFFEE BEFORE SODERING!!!  :laugh:
TFM of FutureSoft
Also visit the CPC and Plus users favorite OS: FutureOS - The Revolution on CPC6128 and 6128Plus

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